Dog releasing device fob door



June 26,1934. F. D. GRUND Re. 19,223

DOG RELEASING DEVICE FOR DOORLATGHES Original Filed Sept. 12. 1930 Mania/4' 1 28 (flit/m fleceased fbe lmenz'm/z Swiss (om vary; lssjgnee,

Reissued June 26 1934 UNITED STATE PATENT- oi-"F cs DOG BELEASING DEVICE FOR- DOOR- LATCHES Fletcher 1). Grand, deceased, late. of Weston, Ohio, by the American Swiss Company, Toledo,

Ohio, assignee Original No. 1,827,982, dated October 20, 1931, Serial No. 481,390, September 12, 1930. Application for reissue October 20, 1933, Serial 'No.

- element away from locking position.

Further objects will hereinafter appear, and by way of illustration but not of limitation, an embodiment of the invention is shown on the accompanying drawing, in which" central portion of the strap or link leading to the remote control unit being broken away; and

Figure 2 is an enlarged sectional viewon the line 2-2 of Figure 1, showing the connection between the remote-operated-strap and the latch bolt.

The illustrated embodiment of the invention comprises a latch unit having a back plate, provided with an upstanding face plate 2, which is apertured to receive a latch bolt head 8. vThe head 3 is riveted to a bolt plate 4 and a spiralspring 5 bears against the rear face of the bolt head 3 urging the same to projected or latching position. Aheadedpin Bmountedonanembossedpart'! .30 of the back plate 1 extends into an elongate slot 8 in the bolt plate, thereby guiding the movement of the latch bolt over the back plate.

For retracting the latch bolt from the outside, a roll back 9 having a squared handle-receiving opening 10, is mounted on theback plate 1, a cover plate 11 extending over the roll backto retain the same in position. Projecting from the hub of the roll back is a hook-shaped arm 12 for a purpose hereinaiter described.

It will be .noted that the strap or link 13 is broken away on the drawing. but may extend in the usual manner to a remote control handle (not shown). Onthe inner end of the'strap 13 is a Figure 1 is a side elevation o a door latch, the

6 Claims. (Cl. 292-169) direction (to the left of Figure 1) can be accomplished when the latch bolt is in projected or latching position. When the rivet is moved to a position beneath the outer end portion of the arm 12, movement of the roll back 9 is blocked, or in other words, clogging of the roll back is effected.

A cardinal feature of this invention resides in so constructing and arranging the parts that when the door is slammed the dogging element (rivet 14, in this case) is automatically moved away from dogging position, thereby releasing the roll back. As shown, the length of the elongate slot 15 is so chosen with relation to the end portion of the arm 12, that when the rivet 14 is in its left hand position and the bolt is retracted, as by slamming the door, the left band edge of the slot 15 positively moves the rivet away from the dogging arm 12. In this manner, accidental lockof the door from the inside before slamming is rendered ineil'ective and in orderto lock the door, the latter must bein closed position before the rivet 14 is moved to dogging position.

Numerous changes in details of construction, arrangement and operation may be effected without departing from the spirit of the invention, especiallyas defined by the claims.

What is claimed is:

1. In a door latch, a latch bolt, a plate rigid with said bolt and having therein a slot extending in the direction of movement of said bolt, outside retracting means including a roll back for said bolt having a contact surface movable laterally across said slot when the roll back is operated to retract the bolt, and inside retracting means including a retracting device having a member extending through said slot and the end of said member being in the path of said surface when said member is in the end. of the slot toward the projected bolt the parts being so proportioned that, upon movement of the bolt to normal retracted position, said end of the slot forces said member out of the'path of said contact surface.

2. A latch 'mechanism for a door including a latch bolt-and two independently operable memhers-for retracting said bolt. one of said members being separate from and movable independentlyofthe bolttodogthe other,andresponsive to displacement of the bolt in non-latching movement. as by closing ot the door to undog said so ltwillbeapparentfromaninspectlonofl'igth urelthatbymovementoftherlvet ltintoengagementwiththerighthanded'geoftheslotlb, retraction of the latch bolt by. the strap 13 can be accomplishedltisfurtherapparentth'at movementofthestrapitinnon-boltretracting a; m a door latch mechanism, a latch bolt, means for retracting the bolt, retracting means separate from the bolt including means for dogging said first retracting means, and means operablebyapartottheboltwhenthcdoggingmeam is in operative dogging position for moving said dogging means to ineflective position so that said first retracting means willbe tree to retract the bolt.

4. In a 'door latch mechanism, a latch bolt, means for retracting the bolt, and means fordogging said retracting means including a retracting member movable by the bolt from operative dogging relation with said retracting means to an ineffective position.

5. A latch mechanism comprising a latch bolt, pivotally mountedmeans for actuating the bolt, and a member separate from saidbolt for alternately actuating said bolt and responsive to movement of said bolt to be actuated thereby, and disposable in certain of its positions to render said actuating means inoperative when said member is neither actuating nor being actuated by said bolt and to render said actuating means operative when it is either actuating or being actuated by said bolt. A i

6. A latch mechanism for a door including a latch bolt, and two independently operable members for retracting said bolt, one of said members being separate from and movable independently of the bolt to render the other member ineflfe'ctive to retract the bolt, and responsive to displacement of the bolt in non-latching movement as by closing of the door, to render said other member effective to retract the bolt.

FLETCHER D. GRUN'D.

Deceased, By THE AMERICAN SWISS COMPANY, By A. F. SEUBERT,

President. 

